Smoking can trigger and aggravate coronary heart disease. The Framingham Heart Study in the United States is a model for medical research, and its results show that smoking an average of 10 cigarettes a day can increase the cardiovascular mortality rate by 18 per cent for men and 31 per cent for women. China’s statistics show that the incidence of coronary heart disease in smokers is twice that of non-smokers. The Beijing Cardiovascular Patient Surveillance results show that for every one-fold increase in the total number of cigarettes smoked, the risk of myocardial infarction increases four-fold. Why can smoking cause and aggravate coronary heart disease? In the smoke produced by burning cigarettes, nicotine and carbon monoxide are the main substances that harm the heart. Nicotine can stimulate the body to release adrenaline, heart rate and myocardial stress increases, causing vasoconstriction, blood pressure rises, platelets are easy to gather, the formation of blood clots, blocking blood vessels. Carbon monoxide will combine with hemoglobin in human blood to form a large amount of carboxyhemoglobin, a substance that can cause arterial walls to become hypoxic and edematous, thus affecting blood flow. In addition, carbon monoxide will also promote the synthesis of fatty acids in the arterial wall, causing an increase in blood cholesterol, creating favorable conditions for the occurrence of atherosclerosis. Therefore, smoking is also a major accomplice of coronary heart disease. At present, China’s smokers are still very common, for the high incidence of coronary heart disease is one of the important factors. Smoking cessation can reduce the risk of death from coronary heart disease. Smoking cessation for 1 year, coronary heart disease death risk reduced by 50%. After quitting smoking for more than 10 years, the risk of death from coronary heart disease is close to that of non-smokers. Promote smoking cessation to protect your heart!